# Created by anaconda and modified by henk
NETWORKING_IPV6=no
IPV6INIT=no
IPV6_AUTOCONF=no
DHCPV6=no
IPV6FORWARDING=no

6./etc/dovecot/dovecot.conf

# A comma separated list of IPs or hosts where to listen in for connections.
# "*" listens in all IPv4 interfaces, "::" listens in all IPv6 interfaces.
# If you want to specify non-default ports or anything more complex,
# edit conf.d/master.conf.
#listen = *, ::
listen = *

I quess it's my nature. As I disabled IPV6 in my entire internal network on every server, it doesn't make sense for a process to listen on ipv6.
On top of that, I like to understand thinks ( a bit), just like Selinux. I always disabled it due the lack of understanding.
As Selinux is enabled and I know how to solve, with some great advise, Selinux related errors, that was ok.

Maybe I should be less stubborn and let Efa4 be the first server to have IPV6 enabled, a bit.

#
# The header name in the next line must have your %org-name% added into it,
# so that it matches what is set in "Spam-Virus Header" in your
# MailScanner.conf file.
#
#header MS_FOUND_SPAMVIRUS exists:X-MailScanner-SpamVirus-Report
header MS_FOUND_SPAMVIRUS exists:X-xxxxxx-MailScanner-EFA-SpamVirus-Report
score MS_FOUND_SPAMVIRUS 3.0
Where xxxxxx is my %org-name%